###### Abstract
Additionally, protein hydrolyses derived from legumes and seaweed extracts from _Ecklonia maxima_ resulted in improved development and metabolites abundance in spinach grown under greenhouse conditions [10]. As the chemical composition may vary among these biostimulants, careful observation is required to understand the modus operandi for a biological compound [6]. Hence, for their sessile nature, plants have evolved a complex signaling mechanism to perceive environmental stimuli and thereby constitute appropriate responses such as the onset of stress or stress-like conditions that may activate the antioxidants system or augment phenolic or carotenoids. Similarly, in response to a growth-promoting stimulus, accelerated photo-respiratory systems or increase in the soluble sugar contents may be noticed [11]. These physiological activities are thus important to consider when evaluating the effects of proposed chemical on the growth responses of the receiver plants. In the past decade, the role of the exogenous application of methyl Jasmonate (MeJA) and acetyl Salicylic Acid (ASA) have been reported to enhance the tolerance of various plants against a variety of biotic and abiotic stresses [12; 13; 14; 15]. Moreover, a mode of action for these chemicals has been proposed in various crop production and protection studies [16; 17]. Besides, numerous botanical compounds have been studied for their bioactivity and reported for their priming effects on the receiver plants, thereby conditioning the plants prior to stress situations [18; 19; 20; 21]. Garlic, among medicinal plant species, holds a spectacular therapeutic repute and has been extensively studied for its antimicrobial properties [22; 23; 24] and, most recently, for its active role in anticancer and cardiological complications [25]. In agricultural crop sustainability, the intercropping of garlic with other crops has also been shown to overcome various biological and environmental constraints [26]. However, less is understood about the possible biological activity of garlic-derived compounds on the growth and physiology of receiver plants, particularly their utility as growth promotors, or about priming inducer/stimulator needs. In our earlier studies, aqueous garlic extract (AGE) has been shown to alter the antioxidative response of cucumber seedlings, and this effect was observed to be concentration-dependent [27]. Moreover, tomato seedlings' growth in response to variable concentrations of AGE revealed significant results [28]. Hence, the role of AGE as a priming inducer to alleviate pathogenic infections in vegetables is still unclear; current research was conducted to evaluate the possibility of using AGE as a priming inducer against fungal infection in pepper plants and as a growth-promoting stimulator for vegetables specifically grown under glasshouse facilities. Additionally, ASA was also applied besides AGE in order to ascertain the results. Our study comprises vital morphological observations such as plant height, leaf area, root length, and shoot and root fresh weight, as well as primary metabolic activities such as chlorophyll contents, soluble sugars, and the biochemical indicators of plants' defense systems, i.e., the antioxidative response of the receiver plants. The findings of the study are thus important to consider for preparations of biological compounds that can be used in specialized horticultural situations such as plastic tunnel and greenhouse production units.